Shuttle-check for power-looms.



, PATBNTBD APR. 9, `1 907. J. P. BLUMER-KUNZ. SHUTTLE CHECK PoR POWERLooMs.;

l APBLIGATION FILED SEPT. 19, 1904.

w, @y F, M. mwlgdMwl ai@ i i Ew n m JEAN FRITZBLUMER-KUNZ, AOF ENGI,SWITZERLAND.

SHUTTLE-CHECK FOR POWER-LOOIVIS.

Specification of Letters Patent.

@atenten April 9, 1907.

Application led September 19, 1904:. Serial No. 225,134.

To a/ZZ whom, it nfl/ay concern:

Be it known that I, J EAN FRITZ BLUMER- IIUNZ, a citizen of the SwissConfederacy, and a resident of Engi, canton of Glarus, Switzerland, haveinvented an Improved Shuttle-Check for Power-Looms, of which thefollowing is a specification.

This invention has reference to an improved shuttle retaining orstopping device for power-looms and its object is to obviate certainwell-known defects appertaining to such devices hitherto in use.

It is well known that in power-looms when the shuttle has been thrown byone of the whip-levers or picking-sticks it strikes against the oppositeone with such force as frequently to rebound, notwithstanding that theshuttlc-boxes are provided with devices for retaining the shuttle andpreventing such rebounding, the result of which is that the edge of thefabric becomes more or less ruffled or curled. This defect is .obviatedby my invention, whereby the momentary retention of the shuttle when atthe end of its travel in the shuttle-box is insured and the reboundingof said shuttle rendered impossible. Further advantages to be derivedfrom my invention are that the breaking of the weft-thread andconsequent stopping of the loom, which is frequently caused by the saidrebounding of the shuttle, is obviatedythe production will consequentlybe increased 5 the fabric will have a better appearance, at least at itsedges; the picking-sticks or equivalent shuttie-throwing devices will beless liable to injury by the shuttle, so that their renewal or repairwill not so frequently be necessary, and consequently the cost of upkeepof the loom will be reduced.

My improved device possesses the further advantage that it can bereadily substituted or 'fixed in place of the hitherto-used deviceswithout necessitating much adjustment or fitting.

In order that my invention may be readily understood, I have illustratedit in the accompanying drawings, in whichh Figure l shows the twoshuttle-boxes of a loom having my improved shuttle-retaining device, theshuttle being shown entering the left-hand shuttle-box. Fig. 2 is asimilar view, the shuttle being in this instance shown at the end of itstravel in the left-hand direction. Fig. 3 shows in horizontal sectionand on enlarged scale the left-hand shuttle-box and shuttle as shown inFig. 1. Fig. 4 is a similar view, but with the shuttle in the positionshown in Fig. 2. Fig. 5 is a vertical sectional view of the shuttle-box,the section being centrally through the slot in which the picking-stickoperates; and Figs. 6 and .6a shcw one form, as an example only, of adetai The shuttle-box is provided with strips or the like L Z on thefront and back, respectively, to prevent the shuttle jumping out, thesevbeing usual in looms. The strips L and Z are respectively adjustablysecured by screws L and l.

The picking-stick P, having a picker o, is guided in a slot P and servessolely to throw the shuttle from the position shown in Figs. and 4 intothe oppositely-arranged shuttle- My improved device for momentarilyretaining the shuttle in the shuttle-box, and thus preventing itsrebounding, consists of a rocking bar a, which is arranged in the slotP', which bar is mounted on the usual pivot or pin a; but the latter isin this instance brought nearer to the center of the rocking bar orcatch than heretofore, being located at a distance equal to aboutonethird the length of the rocking bar from the outer or left-hand endthereof. At its lower face the rocking bar a is formed with twoswellings a2 a3, one at each side of the pivot a', and one of which isat about the center lengthwise of the bar and the other at its outerend.

The pivot a and the swellings a2 a3 are so arranged and are of suchrelative dimensions that the shuttle on entering the shuttle-box willcause the bar a to rock suciently on the pivot a/ to permit the shuttleto pass between the swelling a2 and the front strip L. In this positionthe swelling a3 at the front end of the bar a will be depressed to suchan extent toward the strip L as to prevent the passage therebetween ofthe shuttle, which latter will consequently be stopped and will be heldsecurely between the strip L and the two swellings a2 a3 of the bar a.Any movement either of the bar a or of the shuttle is now-impossible,except when the latter is again thrown by the relative picking-stick.The retention of the shuttle in the shuttle-box is thus accomplishedwithout the employment of any springs.

IIO

rI`he pivots a may, if desired, pass direct through an aperture in thebar a. In order, however, to enable any inaccuracies in the position ofthe iront face of the bar a relatively to the path of travel of theshuttle, which inaccuracies may be caused by a bad Jritting or wearingaway of the pivot or a wearing away of the Jface of the bar itself, tobe easily rectified, I may employ a cylindrical block E, eccentricallythrough which the pivot a passes, as shown in Figs. 3, 4, and 5. Saidblock E is fixed in position in the bar a by a set-screw g and moves orrotates with the latter on the pivot a.

By adjusting the position of the block E the position of the bar arelatively to the path oftravel ofthe shuttle will be simultaneouslyadjusted. An alternative arrangement for attaining this result is shownin Figs. 6 and 6a. In this the free end of the spindle a/ is bent intothe form of the letter U. The longer limb of said spindle is of squaresectional Jform and passes and is slidable through a similarly-shapedeccentrically-placed aperture in the block E. The shorter limb of saidspindle is adapted to be engaged in any one of a series of apertures ein a plate which latter is iixed to the shuttle-box. It will be seenthat in this case the bar a rotates on the cylindrical block E and thatthe latter moves together with the spindle a. To adjust the bar a asdesired, it is only necessary to disengage the short limb of the spindlefrom the plate b kand then insert it in the desired aperture e in saidplate, which will cause the block E to be so moved as to cause the bar ato be moved either, according to the adjustment, in one direction or theother relatively to the path of the shuttle.

In order that the impact of the shuttle against the swellings a2 a3 onthe bar a shall be as soft as possible, I may provide elastic insetsJI-for example, of rubber-at these parts, on which a tough but pliantcovering c-say of leather-is arranged.

Having now fully described my said invention, what I claim, and desireto secure by Letters Patent, is-

l. An improved shuttle-retaining device for power-looms, consisting of ashuttle-box having guide-strips between which the shuttle enters, abinding-bar rockably supported on a pivot arranged he bar than its innerend, said bar having two convex portions on its face, one at each sideof the pivot,-and means for adjusting the bar relative to the path ofthe shuttle in said shuttle-box.

2. An improved shuttle-retaining device for power-looms, consisting of ashuttle-box having guide-strips between which the shuttle enters, abinding-bar roclably supported on a pivot arranged nearer the outer endof the bar than its inner end, said bar having two convex portions onits Jface, one at each side of the pivot, .and means for adjusting thebar relative to the path of the shuttle in said shuttle-box., said meansconsisting of an adjustable block in which the pivot ofthe binding-baris mounted, and an adjusting-screw for said block.

In testimony whereof I have hereunto set my hand in presence of twowitnesses.

JEAN FRITZ BLUMER-KUN Z.

Witnesses:

Lnwrs LERAMAND, JOSEPH SIMON.

nearer the outer end of

